Simultaneous Nadir Overpasses (SNOs) Predictions

Prediction of SNOs between HIMAWARI-9 and NOAA-21 Satellite Orbit:

Table of predicted SNOs for the next 14.0 days since TLE Epoch: 4/20/2025
Index Date Time (HIMAWARI-9) HIMAWARI-9 Lat,Lon NOAA-21 Lat,Lon Distance(km) Time Diff (sec)
1 04/22/2025 04:03:35 -0.03, 140.76 -0.17, 140.07 77.82 80
2 04/23/2025 03:47:28 -0.03, 140.75 0.85, 144.61 440.41 80
3 04/24/2025 16:09:14 0.03, 140.74 0.33, 139.35 158.21 80
4 04/25/2025 15:47:47 0.03, 140.73 -0.69, 143.89 360.17 80
5 04/27/2025 04:09:40 -0.03, 140.71 -0.52, 138.60 240.08 80
6 04/28/2025 03:53:33 -0.03, 140.69 0.50, 143.14 278.74 80
7 04/29/2025 16:15:18 0.03, 140.68 0.67, 137.88 319.06 80
8 04/30/2025 15:53:52 0.03, 140.66 -0.36, 142.42 199.66 80
9 05/02/2025 04:15:45 -0.02, 140.64 -0.78, 137.12 400.31 80
10 05/03/2025 03:59:38 -0.03, 140.62 0.19, 141.67 119.29 80
11 05/04/2025 16:21:23 0.03, 140.58 0.97, 136.40 476.59 80

Figure of HIMAWARI-9 and NOAA-21 satellite orbits during SNOs since TLE Epoch: 4/20/2025
SNOs_Map_HIMAWARI-9_NOAA-21_20250421.jpg

Download SNOs between HIMAWARI-9 and NOAA-21 since TLE EPOCH: 04/20/2025 in txt file.

Historical Predications of SNOs between HIMAWARI-9 and NOAA-21